402 BIcKNELL: HAVE WE ENOUGH NEW ENGLAND BLACKBERRIES ? 
< ARGUTUS: R. ascendens Bld., in part. Nantucket; Long 
Island. 
< FRONDOSUsS: R. abbrevians Bld. Nantucket; Long Island. 
<uispipus: R. setosus Bigel.; R. vermontanus Bld., in part; 
x 
R. trifrons Bld.; R. cubitans Bld.; R. hispidus, var. major 
Bld. The plants described under these names are more 
or less intermediate between R. nigricans and R. hispidus 
and make up a group of connected forms showing the 
interplay among them of the same characters in slightly 
different combinations. R. vermontanus approaches very 
close to forms of R. hispidus X procumbens. 
PROCUMBENS: R. semierectus Bld. LongIsland. R. plica- 
lifolius Bld., although very dissimilar to R. semierectus, 1 
am inclined to regard as a form of the same cross, perhaps 
a semi-pathological state. 
< BAILEYANUS: Long Island. 
x 
ENSLENII: Long Island. 
X FLAGELLARIS: Nantucket. 
RuBUS HIspipus L. 
X CANADENSIS: R. multiformis Bld. 
X ALLEGHENIENSIS: R. permixtus Bld. 
X ARGUTUs: Long Island. 
X FRONDOsUsS: Nantucket. 
X NIGRICANS: See under R. nigricans. 
X PROCUMBENS: Nantucket. 
* BAILEYANUs: Long Island. 
> ENsLentt: Long Island. 
X FLAGELLARIS: Nantucket. 
RUBUS PROCUMBENS Muhl. 
x 
CANADENSIS: See under R. canadensis. 
 ALLEGHENIENSIS: Nantucket; Long Island. 
X ARGuUTUS: Nantucket; Long Island. 
X FRONDOsUs: R. multispinus Bld. Nantucket; Long Island. 
x 
NIGRICANS: R. semierectus Bld. R. plicatifolius Bld. Long 
Island. 
< HISPIDUS: Nantucket. 
x 
BAILEYANUS: R. roribaccus Bailey, which I find almost 
always associated with R. procumbens and R. Baileyanus, 
